// ------------------------------------------------------------------------
//   Project active2
//   Active Thing (activething.com) git.activething.com/go
//
//   File Name  active.go
//   Created by DEV
//   Modified   20/04/2024
//
//   Copyright 2024 activething.com 
// ------------------------------------------------------------------------
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ------------------------------------------------------------------------

package erdata

import (
	"reflect"
	"sync"
	"time"
)


const (

	FieldNameError 		string = "error"
	FieldNameCode  		string = "code"
	FieldNameType  		string = "type"
	FieldNameTypes  	string = "types"
	FieldNameFields  	string = "fields"
	FieldNameCause  	string = "cause"
	FieldNameCauses  	string = "causes"
	FieldNameTrace  	string = "trace"
)

const(

	fieldNameMessage 	string = "message"
	fieldNameInfo	 	string = "info"
	fieldNameDate 		string = "date"
	fieldNameTime  	    string = "time"
	fieldNameParam      string = "param"
	fieldNameSource     string = "source"
	fieldNameUser 		string = "user"
)


const (

	fmtNameDuplicated 	string = "%s-%d"
)

var (

	g = struct {
		mux               sync.RWMutex
		typeCollectors    map[reflect.Type]ErrorCollector
		defaultCollectors FieldCollectors

	}{

		typeCollectors	 : make(map[reflect.Type]ErrorCollector),
		defaultCollectors: defaultCollectors(),
	}
)


func getTypeCollector (rtype reflect.Type) ErrorCollector {
	ec,_ := g.typeCollectors[rtype]
	return ec
}


func CollectErrorFields (collector Collector, err error) {
	if err == nil {
		return
	}
	rt := reflect.TypeOf(err)
	if rt.Kind() == reflect.Pointer {
		rt = rt.Elem()
	}

	if ec,is := err.(Collectable); is {
		ec.Collect(collector)
		return
	}

	g.mux.RLock()
	eb,_ := g.typeCollectors[rt]
	g.mux.RUnlock()
	if eb != nil {
		eb.CollectError(collector,err)
		return
	}

	var nc FieldCollectors
	for _,f := range g.defaultCollectors {
		if f.CollectField(collector,err) {
			nc = append(nc, f)
		}
	}

	g.mux.Lock()
	g.typeCollectors[rt]=nc
	g.mux.Unlock()
}



func defaultCollectors () FieldCollectors {
	return []FieldCollector{

	CollectFieldFnc(func (b Collector, e error ) bool {
		if ms,is := e.(interface { Message() string }); is {
			b.AddFieldString(fieldNameMessage, ms.Message())
			return true
		}
		return false
	}),

	CollectFieldFnc(func (b Collector, e error ) bool {
		if in,is := e.(interface { Info () string }); is {
			b.AddFieldString(fieldNameInfo,in.Info())
			return true
		}
		return false
	}),

	CollectFieldFnc(func (b Collector, e error ) bool {
		if tm,is := e.(interface { Time() time.Time }); is {
			b.AddFieldTime(fieldNameTime, tm.Time())
			return true
		}
		return false
	}),

	CollectFieldFnc(func (b Collector, e error ) bool {
		if tm,is := e.(interface { Date() time.Time }); is {
			b.AddFieldDate(fieldNameDate, tm.Date())
			return true
		}
		return false
	}),

	CollectFieldFnc(func (b Collector, e error ) bool {
		if tm,is := e.(interface { Param() string }); is {
			b.AddFieldString(fieldNameParam, tm.Param())
			return true
		}
		return false
	}),

	CollectFieldFnc(func (b Collector, e error ) bool {
		if tm,is := e.(interface { User() string }); is {
			b.AddFieldString(fieldNameUser, tm.User())
			return true
		}
		return false
	}),

	CollectFieldFnc(func (b Collector, e error ) bool {
		if tm,is := e.(interface { Source() string }); is {
			b.AddFieldString(fieldNameSource, tm.Source())
			return true
		}
		return false
	}),

	}
}